First of all create the pages from the backend after that go to Appearance >> Menu >> Here you can create menu name “primary” and add the pages you have created and then select the below checkbox called Theme location: Primary.

The boxes already have pages, and the primary menu is cued to the boxes. I’m okay with that. But how do I get the top tier and bottom tier menus to tie to the pages, without deleting the box menu as the primary menu?